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What is SHDSL

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**What is SHDSL**

SHDSL (Symmetrical HDSL) is a standardized symmetrical type of DSL. It can operate on one or two pairs of copper wires. Increasing the number of pairs doubles the speed. Speed - 2.31 Mbps on one pair of wires, 4.6 Mbps on two pairs Maximum distance - 6000 m (3.78 miles) or more.

SHDSL is a transmission technology that provides symmetrical data transmission, meaning that the upload and download bandwidths are the same. SHDSL modems use ATM, TDM, and EFM technologies as data link layer protocols. SHDSL modems that use ATM and EFM technologies are typically used for data and voice transmission over IP. Modems using TDM technology in Layer 2 are generally used for voice transmission. Examples of the use of SHDSL TDM modems include carrying PRI lines from telecom exchanges to end-users.

G.SHDSL modems are modems that use ATM technology in Layer 2 and are primarily used for data transmission and VoIP applications nowadays.
 

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